<?php

namespace App\Helpers;

class StringHelper
{
    private $string;

    public function __construct(?string $string = "")
    {
        $this->string = $string;
    }

    /**
     * Establece el string a manipular
     */
    public function setString(string $string): self
    {
        $this->string = $string;
        return $this;
    }

    /**
     * Obtiene el string actual
     */
    public function getString(): string
    {
        return $this->string;
    }

    /**
     * Convierte el string a mayúsculas
     */
    public function toUpper(): self
    {
        $this->string = mb_strtoupper($this->string);
        return $this;
    }

    /**
     * Convierte el string a minúsculas
     */
    public function toLower(): self
    {
        $this->string = mb_strtolower($this->string);
        return $this;
    }

    /**
     * Capitaliza la primera letra
     */
    public function capitalize(): self
    {
        $this->string = ucfirst($this->string);
        return $this;
    }

    /**
     * Capitaliza cada palabra
     */
    public function capitalizeWords(): self
    {
        $this->string = ucwords($this->string);
        return $this;
    }

    /**
     * Elimina espacios en blanco al inicio y final
     */
    public function trim(): self
    {
        $this->string = trim($this->string);
        return $this;
    }

    /**
     * Remueve caracteres especiales y acentos
     */
    public function removeSpecialChars(): self
    {
        $unwanted_array = [
            "Š" => "S",
            "š" => "s",
            "Ž" => "Z",
            "ž" => "z",
            "À" => "A",
            "Á" => "A",
            "Â" => "A",
            "Ã" => "A",
            "Ä" => "A",
            "Å" => "A",
            "Æ" => "A",
            "Ç" => "C",
            "È" => "E",
            "É" => "E",
            "Ê" => "E",
            "Ë" => "E",
            "Ì" => "I",
            "Í" => "I",
            "Î" => "I",
            "Ï" => "I",
            "Ñ" => "N",
            "Ò" => "O",
            "Ó" => "O",
            "Ô" => "O",
            "Õ" => "O",
            "Ö" => "O",
            "Ø" => "O",
            "Ù" => "U",
            "Ú" => "U",
            "Û" => "U",
            "Ü" => "U",
            "Ý" => "Y",
            "Þ" => "B",
            "ß" => "ss",
            "à" => "a",
            "á" => "a",
            "â" => "a",
            "ã" => "a",
            "ä" => "a",
            "å" => "a",
            "æ" => "a",
            "ç" => "c",
            "è" => "e",
            "é" => "e",
            "ê" => "e",
            "ë" => "e",
            "ì" => "i",
            "í" => "i",
            "î" => "i",
            "ï" => "i",
            "ð" => "o",
            "ñ" => "n",
            "ò" => "o",
            "ó" => "o",
            "ô" => "o",
            "õ" => "o",
            "ö" => "o",
            "ø" => "o",
            "ù" => "u",
            "ú" => "u",
            "û" => "u",
            "ý" => "y",
            "ý" => "y",
            "þ" => "b",
            "ÿ" => "y",
        ];
        $this->string = strtr($this->string, $unwanted_array);
        return $this;
    }

    /**
     * Genera un slug a partir del string
     */
    public function slug(): self
    {
        $this->removeSpecialChars();
        $this->string = strtolower(
            trim(preg_replace("/[^A-Za-z0-9-]+/", "-", $this->string))
        );
        return $this;
    }

    /**
     * Trunca el string a una longitud específica
     */
    public function truncate(int $length, string $append = "..."): self
    {
        if (strlen($this->string) > $length) {
            $this->string = substr($this->string, 0, $length) . $append;
        }
        return $this;
    }

    /**
     * Cuenta las palabras en el string
     */
    public function wordCount(): int
    {
        return str_word_count($this->string);
    }

    /**
     * Revierte el string
     */
    public function reverse(): self
    {
        $this->string = strrev($this->string);
        return $this;
    }

    /**
     * Reemplaza todas las ocurrencias de un string por otro
     */
    public function replace(string $search, string $replace): self
    {
        $this->string = str_replace($search, $replace, $this->string);
        return $this;
    }

    /**
     * Extrae una substring
     */
    public function substring(int $start, ?int $length = null): self
    {
        $this->string = substr($this->string, $start, $length);
        return $this;
    }

    /**
     * Convierte el string a camelCase
     */
    public function toCamelCase(): self
    {
        $this->string = lcfirst(
            str_replace(
                " ",
                "",
                ucwords(str_replace(["_", "-"], " ", $this->string))
            )
        );
        return $this;
    }

    /**
     * Convierte el string a snake_case
     */
    public function toSnakeCase(): self
    {
        $this->string = strtolower(
            preg_replace(
                ["/([a-z\d])([A-Z])/", "/([^_])([A-Z][a-z])/"],
                '$1_$2',
                $this->string
            )
        );
        return $this;
    }

    /**
     * Verifica si el string contiene una substring
     */
    public function contains(string $needle): bool
    {
        return strpos($this->string, $needle) !== false;
    }

    /**
     * Verifica si el string empieza con una substring
     */
    public function startsWith(string $needle): bool
    {
        return strpos($this->string, $needle) === 0;
    }

    /**
     * Verifica si el string termina con una substring
     */
    public function endsWith(string $needle): bool
    {
        return substr($this->string, -strlen($needle)) === $needle;
    }

    /**
     * Limpia el string de HTML y PHP tags
     */
    public function stripTags(): self
    {
        $this->string = strip_tags($this->string);
        return $this;
    }

    /**
     * Convierte caracteres especiales a entidades HTML
     */
    public function htmlEntities(): self
    {
        $this->string = htmlentities($this->string, ENT_QUOTES, "UTF-8");
        return $this;
    }

    /**
     * Genera un hash MD5 del string
     */
    public function toMd5(): self
    {
        $this->string = md5($this->string);
        return $this;
    }

    /**
     * Genera un string aleatorio
     */
    public function random(int $length = 10): self
    {
        $characters =
            "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
        $this->string = "";
        for ($i = 0; $i < $length; $i++) {
            $this->string .= $characters[rand(0, strlen($characters) - 1)];
        }
        return $this;
    }
}